Type-writing machine.



A. T. BROWN.

TYPE WRITING MACHINE. APPLIOATION FILED APR. 9. 1913.

1,098,092. Patented May 26, 1914 4 SHEETS-SHEET 1.

FIGI.

WITNEESES. y INVENTDR. MJ/W "LAfWJ/lf www1] VMM 1415 ATTCIRNEY A. T.BROWN.

TYPE WRITING MACHINE.

A APPLICATION FILED APR. Q 191.3. v 1 ,098,092, Patented May 26, 1914.

4 SHEETS-SHEET 2.

VMM

A. T. BROWN.

TYPE WRITING MACHINE. APPLICATION PILBD APR. 9. 1913.

1,098,092. Paned May 26, 1914.

4 SHEETS-SHEET 3.

wwwa-.555. I NVENTDR.

,Y HIE ATTuFgNEY A. T. BROWN.

TYPE WRITING MACHINE.

APPLIOATION FILED APR. 9. 1913.

Patented May 26, 1914.

4 SHEETS-SHEET 4.

FIGA.

WITNESSEE.

INvENmR'.'

ALEXANDER T. BROWN, F SYRCUSE, NEW YORK.

TYPE-WRITING MACHINE.

Specification of Letters Patent.

Patented May 26, 1914.

Original application filed .Tune 1, 1912, Serial No. 700,939. Dividedand this application led April 9, 1913.

Serial No. 759,879.

To all whom it may concern Be it known that I, ALEXANDER, T. BROWN,

citizen of the United States, and resident of a .speciiication Myinvention relates to typeWrit-ing machines and more articularly to typebar machines with shitgzing basket, j

The principal obj ect of my invention is to provide an improvedshiftable type bar supporting means. This has been devised especiallyfor front strike or visible machines, but some, at least, of itsfeatures are applicable or adaptable to other machines.

To the above ends, the invention consists in certain features ofconstruction and combinations and arrangements of parts, all of whichwill be fully set forth herein and particularly pointed out in theclaims.

My invention is embodied in the mechanism illustrated in theaccompanying drawings, in which- Figure 1 is a front to rear verticalsectional view of so much of a typewriting machine as is necessary toillustrate the embodiment of my invention therein. Fig. 2 is a view`showing parts of Fig. 1 on a larger scale and with some parts brokenaway or removed and showing also by broken lines the shifted position ofthe shiftable mechanism. Fig. 3 is a front. elevation in transversevertical section, with parts broken away. Fig. 4 is afragmentary topplan View, with parts broken away and parts in section, landillustrating the case shit't mechanism. Fig. 5 is a fragmentary sideelevation, partly in section, ot a part of said case shift mechanism.Fig. 6 a View similar to Fig. 5 but on a smaller scale and illustratinga modification.

Referring more especially to Fig. 1, the main frame of the machinecomprises a base part 1, on which is mounted a sort of base top plate 2consisting essentially of a horizontal plate or sheet of metal coveringpart of the rectangular' base 1 back oin the key-Y board. This plate 2may be secured to the hase l in any suitable manner, as, for i;- ample,by bolts or screws. Front posts and rear posts et are :iounted on theplato 2 und support a top plate 5 #troni which risc standards 6,supporting a stationary rail or trackway 7, as shown .in Fig. 1,inclined at an angle of about 459 and having race-ways in its upper rearand lower forward edges for. the accommodation of balls or rollers 8which coperate with suitable grooved rails 9 formed in a carriage 10which carries a platen 11.

' Front strike type 'bars 12 are mounted on asegment 13 which, as shownin Fig. 3, vconsists `of a round rod bent, at least through part of itslength, in the arc of a circle and having a series of peripheral grooves14 cut therein and serving as stationary race-ways for anti-frictionballs 15 (Fig. 2). Said balls coperate with ,rings 16 threaded into theeyes at the heels of the type bars and secured in adjust-cd position byscrews 17 connecting together two lugs 18 projecting from the ring-likehub 19 of each of the type bars. Said ring-like hub is sawed through orsplit between the two lugs 18 so that the screw 17 tightens the ring orhub about the rings 16 and thus secures said rings in adjusted position.This ball bearing is or may be substantially identical with that shownin the patent to Barr, No. 943,613, dated December 21, 1909.

Below the pivotal center of each type bar and projecting somewhat towardthe rear from the lheel thereof, is a lug or ear 2O to which is pivotedthe `forward end of a push link 2l, the rear end of which is p-ivoted at22 to the upper end of a. substantially upright sub-lever 23. There is aseries oi' these sub-levers 23 each consisting of a lever ot' the firstord pivoted at 2liin a hanger 25 which is secured by a screw 26 to therear face of a ti: or vertical part. 27 of the plate 2. 'ihe ujf 1.-' iare arran 'l in an are s spending x the heels olf m The su' foe i may beoperated in any 'ur the pres-ent invention s here shawn, said sub-leversitantially painted by ver at 32 approxicmg forward end. The links 31 arecomparatively short, as shown, and when one of the dit) keys 36 isdepressed to move the pivot point 33 upward, the sub-lever 23 and partsconnected therewith are operated, throwing the type bar to the printingposition. ln order to avoid conflict between the key lever and the lowerend of the sub-lever, said key lever is formed at its rear end withzii-substantially upright section 37.

The keys 36 are' arranged in four rows as usual as shown in Fig. 1andthere are four of the'pivot lwires 35, .one for each row of keys.wardly extendingar'in 4 2 .to -which is connected the rear end of arestoring spring 43. The said springshave their forward ends connectedto a row'bf hooks 44 formed on the edge of a bar secured by screws 46 tothe base 1 of the frame.

l have provided a very light, simple and effective shifting segmentconstruction. This mechanism includes a frame best shown in Fig. 4 andwhich consists of two end bars or pieces 47 and a cross bar 48, thelatter being made stili and rigid and being rigidly connected with theformer. Preferably this entire frame consists of a single integralpiece. The arms 47 are approximately orizontal and are pivoted at theirrear ends on pivot screws 50 threaded into lugs 51 projecting from therear posts 4. The right-hand lug 51 is shown broken away in Fig. 4 inorder -to disclose other parts of the mechanism. At their forward endsthe arms 47 are formed with threaded holes into which are screwedcombined pivot and stop screws 52, as perhaps best shown in Fig. 4. Eachof these screwshas a reduced inner end 53 which projects into a hole 54in the end of v the segment 13, the two holes 54jatthe two ends of thesegment beingin Vlirie'si/itli each other. The ends of the segment'aretrued up and abut against the inner surfaces of the arms 47 so thattransverse motion of the segment is prevented. The construction is suchthat said segment is pivoted in the frame 47, 48 on the pivots 53. Saidframe 47, 48 is adapted .to be shifted down and up for upper and lowercase writing, its motion in this respect being limited by the elongatedheads of the screws 52 coperating with stop screws 55 and '56, thescrews 55 being above and the screws 56 being benea'th the heads of thescrews 52. Said screws 55v and 56 arel threaded through brackets securedto the underside of the top plate 5. Each of 'thesef brackets `57comprises a vertical part and two horizontal projecting ears throughwhich latter. the screws 55 and 56 are threaded. The vertical part. oteach of the brackets 57 either contacts with or is very close to the endof the corresponding screw 52 and serves to guide Each of the key levershas a down-4 said screw in its up and down motion against motion in aright and left-hand direction.

In order to cause the segment 13 to maintain a vertical position when itis shifted up and down, said segment has pivoted to the middle thereof aguide link 58, which is pivoted at 59 to an ear 60 projecting from across bar 61, which cross bar connects the two rear posts 4. As hereshown, said cross bar 61 is integral with said posts, but it can ofcourse 'be a separate piece secured in po.

sition in any suitable way. The forward end of the guide link 58 may bepivoted to the segment 13 in any suitable manner. As

here shown v(Fig. 4) said guide link is formed at its forward end 'withthe same sort of strap 19 as the heels of the type bars, saidI strapbeing split at one point and being provided with a screw 17 like thoseof the type bars and said link is pivoted to the seg ment by a ballbearing which occupies the middle one of the grooves 14 of the segment.lt will of course be understood that it is not essential that this linkbe pivoted to the segment by a ball bearing -but the form of the segmentis suchthat that is as convenient a way as any to pivot it.

A spring 62 is connected at its lower end vided for pulling the segmentdown to its l lower position for upper case writing.

The type bars l2 near their free ends normally rest against. a typerestv 63 having-a l pad 64. In order to shift this type rest up and downwith the segment 13 and in a sub-, stantially constant relation to saidsegment, said type rest is supported by arms 65,

which at their rearvends are secured to up# right bars 66, each at itsupper end pivoted at 67 to an ear 68 extending downward from the forwardend of one of the arms or bars 47. The bars 66 extend down through holes70 (Fig. 3) in the plate 2 and just beneath said plate (Fig. 5) each ofsaid bars 66 isA pivoted at 71 to the forwardend of a guide link 7 2,which guide link is substantially parallel with the bars 47, beingpivoted at its rear end at 73 to a lug 74 depending from the plate 2.These guide link s 72, act'- ingon the lower ends of the bars 66, andthe arms 47, acting on the upper ends of said bars, maintain said bar'sin substantially a vertical position, the bars shifting down and up withthe typo bar segment and causing the type rest 63 to shiftcorrespondingly.

In order to shift the segment downward, a case shiftkey 75 is providedin the keyboard and mounted on a lever 76, Figs. 2, 3 and 5, which leverat' its forward part cormeshes responds in outline with the key levers34 and at its rear end is pivoted on the same pivot 7 3 as the guidelink 72. Each of the- Y pressed it pulls the segment 13 down to itsupper case position, as will be understood from the above description.

Instead of part of the construction above described, the modificationshown in Fig. 6

may be employed. According to this modi-2 iication the guide link 72 isdispensed with and the rear end of the shift key lever 76 is pivoted at73, and said lever is connected directly at 71 to the lower end of thebar G6. In this construction the rear end of the key lever 76" serves asa guide link for the lower end of the bar 66.

In a construction like that shown in the drawings, where the type barsare mounted on'a grooved rod, which rod they surround, it is necessaryin assembling the type bars to slip the said type bars over theends ofthe -segment and then to amemble and adjust the ball bearings thereon.It is, therefore, necessary to leave the ends of the segment free fromall rigidly secured attachments which would interfere with the easyassembling and disassembling of the printing mechanism. It isverydiflcult to make a rigid attachment for'this type bar bearing segmentthat can be taken off when it is necessary tc mount and remove type barsand which can then be reattached so that it will not-,become loose inuse. This segment shifts up and down between stops and in use it issubjected to constant jarring' which makes rigid connections for itdiicult to malntain. It is also an advantage with this structure toleave this segment in such position 'that it is free from any strain dueto distortion of the main frame of the machine. V

The present application is a division of my prior application, SerialNo. 700,939, filed June 1, 1912.

Various changes canbe made in the de# tails of construction andarrangement without departing from vmy invention.

1What I claim as new and desire to secure by Letters Patent, is Y l. Ina typewriting machine, the combination of a series of type bars, ashiftable segment on which said type bars are mountsegment on which saidtype bars are mounted, a type rest, a shiftable frame, independentpivotal lconnections for said shift-able frame with said segment andsaid type rest, and guiding means for said segment and type rest. l

3. In a typewriting machine, the combination of a series of type bars, ashiftable segment on which said type bars are mounted, a shift frame towhich said segment is pivoted, a type rest, supporting means for saidtype rest pivoted to said shift frame, and a shift key connected withsaid supporting means.

4. Ina typewriting' machine, the combination of a type bar supportconsisting of a rod having a series of ball bearing grooves therein, ashiftable support to which said rod is directly pivoted at its ends, anda guide link pivoted to ,the middle of said rod. l 5. In a typewritingmachine, the combination of a series of type bars, a type bar supportconsisting of a rod having a series of ball bearing grooves therein forsaid type hars, a shift frame to which said rod is pivotedvat its ends,and a guide link pivoted to said rod by a ball bearing groove in saidrod.

i 6. In a typewriting machine, the combinationof a series of type bars,a support for said type bars consisting of a rod having a series of ballbearing grooves therein, a shiftable frame'to which said rodis directlypivoted at its ends, and a type rest independently pivot-ally connectedwith said frame.

7. In a typewriting machine, the combination ofa shift frame pivotallymounted, a type bar` segment pivotally connected with said shift frame,front strike typel bars mounted in said segment, a frame comprising atype'v rest and two bars, one at either side of the-machine, said framepivoted to said shift frame and said bars extending downward, means forguiding the lower .ends of saidl b`ars,and means for shifting said shiftframe, type barvsegment and type rest frame.

8. In a typewriting machine, the combination ofja series of front striketype bars,- a support for Said type bars shiftably mounted, and a shiftkey lever, one of the lever arms of `said key lever serving as a guidelink for said support.

9v.l In a typewriting machine, the combination of a shift frame, a typebar/segment having a series of front strike type bars thereon, a pivotalconnection between said shift frame and said segment, said connectioncomprising a screw having one end reduced to serve as a pivot and havingan elongated head, a bracket having stops cooperating with said head,and guiding means coperating with vsaid head.

10. In a typewriting machine, the combination of a shift frame, asegment, a series of front strike type hars mounted on said segment,pivotal connections between said segment and said shift fmme comprisingtwo pvot screws or pins one at each end of the segment, each of saidpins or screws having a, reduced inner end to serve as a pvot and ahead, upper and lower stops oooperating with seid heads, and guides forthe ends of said heads to prevent transverse 10

